ARGOS (Advanced Research and Global Observation Satellite)

ARGOS (Advanced Research and Global Observation Satellite) is the most advanced research and development satellite ever launched by the
United States Air Force. It carries an ion propulsion experiment, ionospheric instruments, a space dust experiment, a high-temperature
semiconductor experiment, and the Naval Research Laboratory's hard X-ray astronomy detectors for X-ray binary star timing observations. Much delayed, it was finally placed into orbit
on the 11th launch attempt along with the secondary payloads Ørsted and Sunsat.